There Was a Tuner (1980)

A few years ago, a mysterious serial-killer caused panic on Crippen High School. The killer was never caught. A movie company, Cosmic Pictures, has decided to make a feature movie about these events - on location, at the now abandoned school. Since members of cast and crew disappear without a trace, it seems as if history is repeating itself...

Having recently witnessed the horrific results of a top secret project to bring the dead back to life, a distraught teenager performs the operation on his girlfriend after she's killed in a motorcycle accident.

Scooby-Doo and the gang participate in a toy store's holiday parade where they discover the abandoned haunted clock tower with a troubled past. A sinister snowman haunts the streets and accompanied with a large blizzard, threatens to close down the toy store for good.

After a doctor kills his mistress and himself while researching the mysterious previous owner of his Boston home, his colleague, Dr. Norman Boyle, takes over his studies and moves his family into the Boston mansion. Soon after, Boyle's young son Bob becomes plagued by visions of a young girl, who warns him of the danger within the house.

Survivalist Burt Gummer returns home to Perfection, to find that the little town has been shaken up again by morphing, man-eating Graboids.

A cosmic case of flying saucers, intergalactic intrigue and out-of-this-world romance launches Scooby-Doo! and the Mystery Inc., Gang into their most unearthly adventure ever.

A New York City cop and an expert criminologist trying to solve a series of grisly deaths in which the victims have seemingly been maimed by feral animals discover a sinister connection between the crimes and an old legend.

When the puzzle box is once again solved, Pinhead and his legion demolish all who dare oppose them. But standing in his way is the only person who has defeated Cenobites of the past.

After going their separate ways, Scooby-Doo, Shaggy, Velma, Daphne, and Fred reunite to investigate the ghost of Moonscar the pirate on a haunted bayou island, but it turns out the swashbuckler's spirit isn't the only creepy character on the island. The sleuths also meet up with cat creatures and zombies... and it looks like for the first time in their lives, these ghouls might actually be real.

The Swamp Thing returns to battle the evil Dr. Arcane, who has a new science lab full of creatures transformed by genetic mutation, and chooses Heather Locklear as his new object of affection.